检索结果-内蒙古大学图书馆

您好，读者！请登录

内蒙古大学图书馆

首页
概况
党建
资源
服务
科研支持
- 论文收录引用证明
- 科技查新
知识产权
档案馆
帮助

咨询与建议

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

您的常用邮箱：*

您的手机号码：*

问题描述：

当前已输入0个字，您还可以输入200个字

全部搜索
期刊论文
图书
学位论文
标准
纸本馆藏
外文资源发现
数据库导航
超星发现

高级检索

时间限定

出版年份：

文献类型

图书期刊文献学位论文多媒体

馆藏选择

电子馆藏纸本馆藏

核心期刊

全部期刊 SCI 收录期刊 SSCI 收录期刊 EI 收录期刊 CSCD 收录期刊 CSSCI 收录期刊

语言

中文英文

文献类型

期刊文献图书学位论文标准纸本馆藏

帮助

文字说明：

T=题名（书名、题名），A=作者（责任者），K=主题词，P=出版物名称，PU=出版社名称，O=机构（作者单位、学位授予单位、专利申请人），L=中图分类号，C=学科分类号，U=全部字段，Y=年（出版发行年、学位年度、标准发布年）

检索规则说明：

AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：

范例一：(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二：P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016

分类表

所选分类

>> <<

限定检索结果

文献类型

227 篇 会议
126 篇 期刊文献

馆藏范围

353 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

248 篇 工学
- 57 篇 计算机科学与技术...
- 50 篇 软件工程
- 47 篇 信息与通信工程
- 43 篇 电子科学与技术（可...
- 43 篇 船舶与海洋工程
- 39 篇 仪器科学与技术
- 35 篇 化学工程与技术
- 34 篇 电气工程
- 30 篇 光学工程
- 26 篇 机械工程
- 26 篇 控制科学与工程
- 25 篇 动力工程及工程热...
- 16 篇 力学（可授工学、理...
- 15 篇 材料科学与工程（可...
- 15 篇 土木工程
- 15 篇 环境科学与工程（可...
- 11 篇 冶金工程
- 10 篇 水利工程
- 10 篇 生物工程
- 7 篇 生物医学工程（可授...
188 篇 理学
- 114 篇 物理学
- 61 篇 数学
- 34 篇 化学
- 23 篇 统计学（可授理学、...
- 17 篇 海洋科学
- 17 篇 生物学
- 9 篇 系统科学
- 6 篇 大气科学
20 篇 管理学
- 11 篇 管理科学与工程(可...
10 篇 农学
6 篇 医学
2 篇 军事学
1 篇 法学
1 篇 教育学
1 篇 文学

主题

13 篇 underwater acous...
11 篇 signal to noise ...
9 篇 acoustics
8 篇 feature extracti...
7 篇 time-frequency a...
6 篇 sea measurements
6 篇 reverberation
6 篇 oceans
6 篇 electric fields
5 篇 sensitivity
5 篇 analytical model...
4 篇 acoustic fields
4 篇 simulation
4 篇 frequency modula...
4 篇 fiber bragg grat...
4 篇 magnetic fields
4 篇 signal processin...
4 篇 ships
4 篇 navigation
4 篇 mathematical mod...

机构

117 篇 science and tech...
12 篇 dalian scientifi...
12 篇 college of under...
9 篇 science and tech...
8 篇 key laboratory f...
7 篇 science and tech...
7 篇 beijing key labo...
7 篇 dalian scientifi...
7 篇 beijing engineer...
6 篇 key laboratory o...
6 篇 department of au...
6 篇 science and tech...
5 篇 analysis and tes...
5 篇 xi'an precision ...
5 篇 school of marine...
5 篇 dalian institute...
5 篇 science and tech...
5 篇 national key lab...
5 篇 science and tech...
4 篇 school of marine...

作者

18 篇 bing jia
17 篇 jia bing
15 篇 guijuan li
15 篇 li guijuan
15 篇 yunfei chen
11 篇 chen yunfei
10 篇 peng yuan
10 篇 wang zhenshan
9 篇 zhang yang
8 篇 jintao yong
8 篇 yang zhang
8 篇 wang rui
7 篇 cui pei
7 篇 yuan peng
7 篇 lin mu
7 篇 mu lin
7 篇 chunxia meng
7 篇 zhenshan wang
6 篇 rui wang
6 篇 zhang fengzhen

语言

332 篇 英文
15 篇 中文
6 篇 其他

检索条件"机构=Science and technology on Underwater Test and Control Laboratory"

共 353 条记录，以下是51-60 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

underwater Transient Noise Duration Estimation Method Based on the Page test

Underwater Transient Noise Duration Estimation Method Based ...

引用

IEEE/OES China Ocean Acoustics (COA)

作者： Qin-Chuan Zhang Yan-Sen Liu Wang Yang Dalian Scientific Test and Control Technology Institute Dalian P. R. China Science and Technology on Underwater Test and Control Laboratory Dalian Scientific Test and Control Technology Institute Dalian P. R. China

ISBN: (数字)9798350340297

ISBN: (纸本)9798350340303

The underwater transient noise radiated by ships provides rich target information and is the focus of target acoustic characteristics analysis. The duration is a crucial representation parameter of the time-domain envelope. The Page test is an effective method for detecting transients, as it can be used to estimate the starting time of the transient. Hence, in this study, the ending time of the transient is estimated by performing time-domain reversal on the signal. In addition, in a low-signal-to-noise ratio environment, wavelet noise reduction pre-processing is introduced to improve the estimation effect and then to estimate the duration of transient noise. The simulation verification results reveal that this method can accurately estimate the duration of underwater transient noise and can also ensure high accuracy in low-signal-to-noise ratio environments.

关键词： Accuracy Oceans Noise reduction Estimation Acoustics Transient analysis Time-domain analysis Marine vehicles Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

Feature Mining Method Based on Deep Learning for underwater Electric Field Prediction in Marine Environment

Feature Mining Method Based on Deep Learning for Underwater ...

引用

Communication Systems (ECCS), European Conference on

作者： Pei Cui Kaina Jiang Jin Yue Yuanzhe Wu Yibo Fu Science and Technology on Underwater Test and Control Laboratory Dalian China Dalian Institute of Measurement and Control Technology Dalian China

The low-frequency electric field generated by various electromagnetic effects in the ocean overwrites the useful signal in amplitude and frequency, as a background distraction field for electric field detection. Effective electric field characteristic analysis and prediction methods are helpful to improve the environmental adaptability of the equipment and the ability of target detection. The deep learning method is used to mine the characteristics of underwater electric field in the marine environment to improve the prediction accuracy. In order to explore the relationship between seawater environmental parameters and electric field characteristics, parameters including measure time, seawater conductivity, water depth and wave height are used as independent variables, and the amplitude of the underwater electric field in the marine environment is used as the dependent variable. The relationship model between independent variables and dependent variables are established by deep neural network training to realize the prediction of underwater electric field characteristics in the marine environment. The results of 103 training samples and 2 test samples show that the method can effectively identify the test samples, and can be used for the mining and prediction of underwater electric field characteristics, as well as the detection and identification of weak electric field signals submerged in the marine environment.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Influence of Physical Parameters on Echo Spectrum of underwater Target

Influence of Physical Parameters on Echo Spectrum of Underwa...

引用

IEEE/OES China Ocean Acoustics (COA)

作者： Yunfei Chen Dapeng Yu Bing Jia Zhenshan Wang Jintao Yong Yanjie Wang School of Information and Communication Engineering Dalian University of Technology Dalian China Science and Technology on Underwater Test and Control Laboratory Dalian China

ISBN: (数字)9798350340297

ISBN: (纸本)9798350340303

The elastic scattering features of the underwater target scattering wave depend on the physical parameters of the target, such as the material and structure. Intuitively evaluating the influence of the elastic scattering wave on the characteristics of the whole scattering wave signal is difficult due to the coupling and superposition of the elastic scattering wave and the geometric scattering wave of the target. Based on the different modulation characteristics of broadband echo spectrum produced by target geometry scattering and elastic scattering wave, this paper characterizes and studies the modulation features of echo spectrum and tests the influence of physical parameters on the echo spectrum of underwater target using several simple cylindrical targets with different physical parameters. Moreover, the geometric scattering wave and the elastic scattering wave of the simple target echo are extracted using the fractional Fourier transform (FrF $T$ ) domain filtering method, and the influence of physical parameters on the echo spectrum is quantitatively analyzed.

关键词： Geometry Couplings Fourier transforms Filtering Oceans Scattering Modulation Feature extraction Acoustics Broadband communication

来源：评论

学校读者我要写书评

暂无评论

Multivariate Multiscale Sample Entropy for Multi-Channel underwater Acoustic Signal Analysis 7

Multivariate Multiscale Sample Entropy for Multi-Channel Und...

引用

7th IEEE Information technology, Networking, Electronic and Automation control Conference, ITNEC 2024

作者： Zhou, Jing Li, Yaan Wang, Mingzhou Shi, Lei School of Marine Science and Technology Northwestern Polytechnical University Xi'an China Xi'an Precision Machinery Research Institute National Key Laboratory of Underwater Information and Control Xi'an China

ISBN: (纸本)9798350370782

Multi-channel time series collected by arrays are prevalent in underwater acoustic signal processing and are crucial for uncovering the intrinsic characteristics of the observed system. This paper introduces the multivariate multiscale sample entropy (MMSE) to assess the complexity information in multi-channel underwater acoustic signals. Simulation analysis is employed to validate the effectiveness of the MMSE algorithm in extracting both within-channel and cross-channel information from multi-channel signals. Various types of simulated ship-radiated noise are generated to illustrate the MMSE algorithm's capability to differentiate between signals. Additionally, we employ MMSE to analyze various real-world signals, including ship-radiated noise, ambient noise, and interface reverberation. The MMSE results demonstrate its proficiency in differentiating various underwater acoustic signals compared to traditional frequency domain methods. © 2024 IEEE.

关键词： Frequency domain analysis

来源：评论

学校读者我要写书评

暂无评论

Self Noise Measurement and Analysis of "Sea wing 300" underwater Glider

Self Noise Measurement and Analysis of "Sea wing 300" Underw...

引用

2021 OES China Ocean Acoustics, COA 2021

作者： Chunping, Zhai Zhongcheng, Ma Keven, Wang Lin, Wu Test and Control Laboratoory Science and Technology on Underwater Dalian China

ISBN: (纸本)9781728181905

In order to carry out ocean sound field observation in deep sea, wide frequency band and long-term space-time based on the underwater glider platform, this paper uses the opportunity of "Sea wing 300"underwater glider sea test, carries the underwater acoustic sensor of rigid binding and elastic suspension installation mode, analyzes the basic characteristics of the underwater glider's self noise. The results show that the underwater acoustic sensor adopts the elastic suspension mode, which can significantly reduce the low-frequency vibration interference of the moving platform. On this basis, the time-frequency characteristics of the acoustic field signals of different equipment such as the buoyancy driving mechanism, the pitching mechanism, the steering mechanism, the CTD pump and the flow noise are obtained, and the application suggestions are given according to the distribution of the acoustic field characteristics. © 2021 IEEE.

关键词： Acoustic fields

来源：评论

学校读者我要写书评

暂无评论

A Hydroacoustic Positioning Method Based on Analysis of the Error Region of Three-circle Intersection

A Hydroacoustic Positioning Method Based on Analysis of the ...

引用

2021 OES China Ocean Acoustics, COA 2021

作者： Cui, Pei Jiang, Kaina Lv, Junjun Zhao, Zhe Yue, Jin Jiao, Dawen Dalian Institute of Measurement and Control Technology Dalian China Science and Technology on Underwater Test and Control Laboratory Dalian China

ISBN: (纸本)9781728181905

A hydroacoustic positioning method based on three-circle intersection presented in this paper is used to locate the underwater measuring units equipped with sensors to measure magnetic and electric field. Due to the existence of controllable and non-controllable error sources such as measurement distance of underwater acoustic and entry depth of the surface positioning device in the positioning process, there is a triangle error area that makes the positioning results not satisfactory. In order to improve the positioning accuracy, the convergence and diffusion law of the triangle error area are studied with data analysis software by setting error ranges of the positioning circle radius and the step size in response to the measured results in sea test. The analysis results show that the optimized positioning method based on the three-circle intersection can well reduce the size of the triangle error area and effectively improve the positioning accuracy. © 2021 IEEE.

关键词： underwater acoustics

来源：评论

学校读者我要写书评

暂无评论

Navigation radar image fusion of different scales based on improved wavelet transform rules

Navigation radar image fusion of different scales based on i...

引用

Chinese control and Decision Conference, CCDC

作者： Haoyan Zhang Lu Zhang Fangyuan Jin Yuanyuan Guo Yunying Wang Yunsheng Fan Science and Technology on Underwater Test and Control Laboratory Dalian China College of Marine Electrical Engineering Dalian Maritime University Dalian China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

Due to the disadvantages of the image fusion system such as unclear target contour of long-range radar image, insufficient perceptual range of near-range radar image and insufficient detail of traditional wavelet transform fusion rules for processing high frequency coefficients, the fused images cannot meet the requirements of large information volume, high definition and small discrepancy. To solve this problem, the maximum Brenner region energy wavelet transform image fusion (MBREWTIF) algorithm is proposed, Firstly, the alignment of the two radar images is realized to prepare for the next step of algorithmic fusion. Secondly, an improved fusion rule for high frequency coefficients is devised based on the wavelet transform image fusion algorithm. Finally, the Brenner region energy method is developed by combining the energy gradient of the Brenner function method and the improved fusion weight in the region energy method. The simulation results verify that the proposed MBREWTIF algorithm improves the content and clarity of image information and reduces the discrepancy in the dual radar fusion process compared with other existing algorithms.

关键词： Wavelet transforms Navigation Simulation Radar imaging Market research High frequency Image fusion

来源：评论

学校读者我要写书评

暂无评论

Experimental study on the effect of underwater multiple degradation links on optical signal transmission: Experimental study on the effect of underwater multiple degradation links on optical signal transmission 6

Experimental study on the effect of underwater multiple degr...

引用

6th International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2023

作者： Zhang, Jianlei Zhang, Pengwei Zhu, Yunzhou Tian, Yuxin School of Electronic Engineering Xi'an University of Posts and Telecommunications Xi'an710121 China Science and Technology on Underwater Information and Control Laboratory Xi'an710077 China

ISBN: (纸本)9798400707674

This paper presents an experimental investigation of the impact of various environmental factors, including temperature, salinity, and air bubbles, on the transmission of optical signals. A reception model was established to capture the degradation of the optical signal as it passes through multiple links. The fading of optical signals passing through different channels was quantified and analyzed. The findings highlight the distinct impacts of temperature, salinity, and air bubbles on the propagation of optical signals. Additionally, the study reveals that turbulence intensity plays a pivotal role in influencing the variability of the normalized amplitude of the received signal. © 2023 ACM.

关键词： Turbulence

来源：评论

学校读者我要写书评

暂无评论

Coupled analysis of Braceless semi-submersible offshore wind turbine under different water depths 32nd

Coupled analysis of Braceless semi-submersible offshore wind...

引用

32nd International Ocean and Polar Engineering Conference, ISOPE 2022

作者： Zhou, Zhimin Wang, Xianzhi Zhou, Xiangbo Qiao, Dongsheng Yan, Jun Ning, Dezhi Science and Technology on Underwater Test and Control Laboratory the 760th Research Institute of China Shipbuilding Industry Corporation Dalian China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian China

ISBN: (纸本)9781880653814

Braceless semi-submersible floating offshore wind turbine (FOWT) is subjected to environmental loads during its service, and the different combinations of wind, wave, and current environmental loads have different contributions to the motion responses of the offshore wind turbine platform. Under the different water depth of 100m, 150m, 200m, the time domain motion response calculation model of floating wind turbine platform was established, and the corresponding time-domain motion of wind turbine platform with six degrees of freedom and the mooring line tension were analyzed. The results show that the maximum motion response and mooring line tension are all in line with the engineering requirements. The results of this study provide reference for further research on the design of mooring system. © 2022 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Semisubmersibles

来源：评论

学校读者我要写书评

暂无评论

Study on Fluctuation Characteristics of Acoustic Signals under Density Layered Fluid Disturbance

Study on Fluctuation Characteristics of Acoustic Signals und...

引用

IEEE/OES China Ocean Acoustics (COA)

作者： Jintao Yong Yunfei Chen Zhenshan Wang Bing Jia Rui Wang Shiqi Mo Science and Technology on Underwater Test and Control Laboratory Dalian China College of Underwater Acoustic Engineering Harbin Engineering University Harbin China College of Information and Communication Engineering Dalian University of Technology Dalian China

ISBN: (数字)9798350340297

ISBN: (纸本)9798350340303

This study investigates the fluctuation characteristics of acoustic signals in the presence of flow field perturbations within density-stratified fluids through laboratory simulation experiments. A density stratification tank was used to replicate the ocean's stratified environment. The SUBOFF scaled model was employed to mimic the underwater vehicle's navigation process in towing mode. controlled density stratification simulation experiments were conducted to explore the acoustic signal fluctuation characteristics within the wake flow field of the submerged model. Data on the undulation properties of acoustic signals that propagated through the wake flow field of the underwater vehicle were collected. The undulation characteristics of the acoustic signal at two towing speeds and various spatial positions were analyzed. In alignment with the typical marine environment characteristics, this study designed the stratification conditions, the scale of the scaled model, and the towing speed based on the Froude number (Fri) similarity criterion and the geometric similarity law. The analysis of the experimental results indicates that the fluctuating frequency of the acoustic signal amplitude diminishes over time as the wake dissipates post-target passage. Concurrently, the intensity of the high-frequency fluctuation component of the signal also decreases with the dissipation of the wake.

关键词： Time-frequency analysis Fluctuations Fluids Navigation Perturbation methods Oceans Attenuation Acoustics underwater vehicles

来源：评论

学校读者我要写书评

暂无评论

没有更多数据了...

全选清除本页清除全部题录导出标记到“检索档案”

共36页 << < 2 3 4 5 6 7 8 9 10 11 > >>

检索报告对象比较合并检索0

隐藏清空

合并搜索

回到顶部

执行限定条件

内容：

评分：

请选择保存的检索档案：

请选择收藏分类：

订阅名称：

通借通还

温馨提示：

图书名称：

借书校区：

取书校区：

手机号码：

邮箱地址：

一卡通帐号：

电话和邮箱必须正确填写，我们会与您联系确认。

联系人：

所在院系：

联系邮箱：

联系电话：

内蒙古自治区呼和浩特市赛罕区大学西街235号邮编: 010021

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：